This was a joke..the man extended the expiration date because he didn't do this in the winter (not indicated on the groupon)..gave it as a xmas gift and didn't get to use it till July. Very hard to get ahold of, he didn't like to return phone calls, groupon did not say he didn't go out of Lincoln so he would not go out of town to do the job (told me to call groupon and get my money back), forgot to clean places on the vehicle, left wax on the vehicle, was doing 2 vehicles in one day for me (because he would not travel out of town), was 1 1/2 hours late and then between vehicles he left for 2 hours. Will not recommend this man to anyone and will be calling groupon to complain about his work.